Gwen,
Your are treading a dangerous path. Three times over the years I have had that experience.
The first was a comedy novel based on a pub and because of its location I wrote that the Equal Rights Commission had instructed them to change the name of the pub from the Prince of Wales to The Prince of Delhi to better reflect the balance of the local population. Tongue in cheek of course, it was a comedy.
The second time, in a book (work in progress) I forecast a flood in the Thames Valley, a year later it happened for real. The last one was in, again a non TG book, I adjusted the time line so that my Anglo Celts could build a boat larger than a coracle and enabled them to build a sea going knarr a hundred or so years before they ever did. Last year a knarr was discovered in Britain and when it was carbon dated and checked it was discovered to have been built in England of English wood and nails and the craftsmanship proved it had been built by Anglo Celts at about the time I had my fictional Celts build one in Cornwall.

I shall shortly win the big prize on the lottery, fancy coming with me to Delphi for the winter because I also forcast than when we return to the UK we will be stunningly beautiful goddesses.